AutoMD ... 11/4/2013
2009 Honda Accord EX-L 6 Cyl 3.50L
How do you solve carbon build-up from occurring repetitively causing engine light to come on and car run rough?
There is 80K miles on the engine, all services have been performed by the dealer as required. This first happened at 12K and the dealer said it might be a bad spark plug. Later happened again and 2 cylinders were involved. Replaced all of the plugs well before the 100K per manual with same results. Car has now been at the dealer 7times without a resolution to the problem. Car is driven both locally and a lot of high speed hiway miles, too. Factory is involved but no promising results. Help!!!!
I need all specifics including code number information, even if you have to rewrite notations made on your invoice. There is a TSB about multiple misfires on 2008 to 2010 Accord with 3.5 engine. The TSB # is 10-033 but my gut feeling as a mechanic for 37 years says your cause is something else being overlooked. If you want me to help you identify your cause here and lets just skip the dealer service dept I need you to buy a code reader from amazon for $17. Reading codes takes a minute. I need to know code numbers that show up after you feel it running poorly.